package main

import (
	"flag"
	"fmt"
)

func main() {
	var arg1 = flag.String("arg1", "arg1-default", "help: arg1 is string.")
	var arg2 = flag.Bool("arg2", true, "help: arg2 is boolean.")
	var arg3 = flag.Int("arg3", 16, "help: arg3 is int.")
	flag.Parse()
	
	fmt.Printf("arg1 = %s\n", *arg1)
	fmt.Printf("arg2 = %s\n", *arg2)
	fmt.Printf("arg3 = %d\n", *arg3)
}

